Fix new clang warnings.

2019-08-27  Martin Liska  <mliska@suse.cz>

	* cgraph.c (cgraph_node::remove): Remove dead assignment before
	loop.
	* config/i386/i386-features.c (scalar_chain::emit_conversion_insns):
	Enclose in anonymous namespace.
	* config/i386/x86-tune-costs.h (struct processor_costs): Wrap
	hard_register initialization in braces.
	* tree-vrp.h (value_range_base::supports_type_p): Return false
	for function with boolean return type.

From-SVN: r274945

gcc/ChangeLog

+2019-08-27  Martin Liska  <mliska@suse.cz>
+
+	* cgraph.c (cgraph_node::remove): Remove dead assignment before
+	loop.
+	* config/i386/i386-features.c (scalar_chain::emit_conversion_insns):
+	Enclose in anonymous namespace.
+	* config/i386/x86-tune-costs.h (struct processor_costs): Wrap
+	hard_register initialization in braces.
+	* tree-vrp.h (value_range_base::supports_type_p): Return false
+	for function with boolean return type.
+
 2019-08-26  Uroš Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (emit_i387_cw_initialization)

gcc/cgraph.c

@@ -1783,7 +1783,7 @@ cgraph_node::remove (void)
      */
   force_output = false;
   forced_by_abi = false;
-  cgraph_node *next = nested;
+  cgraph_node *next;
   for (cgraph_node *n = nested; n; n = next)
   {
     next = n->next_nested;

gcc/config/i386/i386-features.c

@@ -274,6 +274,8 @@ xlogue_layout::get_stub_rtx (enum xlogue_stub stub)
 
 unsigned scalar_chain::max_id = 0;
 
+namespace {
+
 /* Initialize new chain.  */
 
 scalar_chain::scalar_chain (enum machine_mode smode_, enum machine_mode vmode_)
@@ -622,6 +624,8 @@ scalar_chain::emit_conversion_insns (rtx insns, rtx_insn *after)
   emit_insn_after (insns, BB_HEAD (new_bb));
 }
 
+} // anon namespace
+
 /* Generate the canonical SET_SRC to move GPR to a VMODE vector register,
    zeroing the upper parts.  */
 

gcc/tree-vrp.h

@@ -265,7 +265,7 @@ value_range_base::supports_type_p (tree type)
 {
   if (type && (INTEGRAL_TYPE_P (type) || POINTER_TYPE_P (type)))
     return type;
-  return NULL;
+  return false;
 }
 
 extern void register_edge_assert_for (tree, edge, enum tree_code,